I am not a fan of true crime as entertainment. Both my parents enjoyed it, so I got exposed to far more true crime shows than I ever wanted to watch. The forensic shows were the most tolerable, because they tended to focus on the science, which was interesting. Even so, they’d watch hour after hour of them, and I’d have to find some distraction after a while, because I found it depressing to be exposed to so much real-life pain and misery.
I don’t mind fictional who-dunnits, in moderation, because they’re fiction. There’s an element of puzzle-solving to them, because the viewer can match wits with the detectives to see who puts together the clues first. But my folks watched a lot of those too, to the point I still feel kind of burned out on shows like Criminal Minds and such. I prefer the cozier kind of mysteries; I used to regularly watch Castle and Lucifer, which had focused as much (if not more) on the regular characters’ lives as they did on the plot… but that’s my personal preference. 
